بررسي تاثير پروتكل هاي گرم كردن كششي متفاوت بر عملكرد دو سرعت 20 متر فوتباليست هاي تمرين كرده

The Effect of Different Warm-up Stretch Protocols on a 20-Meter Sprint in Trained Soccer Players.

The purpose of this study was to determine the effect of different static and dynamic stretch protocols on a 20-meter sprint. 97 male soccer players were randomly assigned to 4 groups, (i) Passive static stretch (PSS) (n=28), (ii) active dynamic stretch (ADS) (n=22), (iii) active static stretch (ASS) (n=24), (iv) static dynamic stretch (SDS) (n=23). All groups performed a standard 10-min. jog as the warm - up, followed by two 20-m sprints. The 20-m sprints were repeated after subjects performed different stretch protocols. The PSS and ASS groups had a significant increase in sprint period (P<0.05), while the ADS group had a significant decrease in sprint period (p^O.05). It was concluded that static stretching as part of a warm-up may decease short sprint performance, while active dynamic stretching seems to increase 20-m sprint performance.